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|Java - Interview Questions and Answers|
|Not frequently asked as it was introduced with Java 8.|
|Ans. This is an informative annotation that specify that the interface is a functional interface. A Function Interface has only one abstract method and many default methods. Compiler generates an error if the interface specified with the annotation doesn't abide by the specifications for functional interface.|
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|Like Discuss Correct / Improve  java   java8   java 8   functional interface   default methods|
|How do you define a functional interface?|